code: def initialize(self, symbol):
      self.rl = SecurityListSet(self.get_datetime, self.asset_finder)
      self.set_asset_restrictions(self.rl.restrict_leveraged_etfs)
      self.order_count = 0
      self.sid = self.symbol(symbol)
  
file_path: catalyst/tests/test_security_list.py
imports: from catalyst.algorithm import TradingAlgorithm
  from catalyst.utils.security_list import SecurityListSet, load_from_directory
label_desc: Use image node_id 1 for calling the RestrictedAlgoWithCheck obj's underlying member method code with example usage: obj.initialize(symbol) without return types